Dorfer



(No Model.)

C. W. BOMAN.

LEAD AND URAYON HOLDER.

lllll munt" n Illl Patented Sept. 12, 1882.

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UNITED STATES PATENT OFFICE.V

cLAEs w. EOMAN, OE NEw YORK, N. Y., AssieNOE To JOSEPH EEOKEN- DOEEEE, OE SAME PLACE.

LEAD OR CRAYONHOLDER.

SPECIFICATION formingl part of Letters Patent No. 264,131, dated September 12, 1882.

Application tiled June 7, 1882. (No model.)

To all whom it may concern Be it known that I, CLAES W. BOMAN, of the city, county, and State of New York, have invented a certain new and useful Improvement in Lead or Crayon Holders, of which the following is aspecitication.

My invention relates to that kind ot' lead and crayon holder now generally known under the trade-name of automatic;7 and it has reference to the mechanism whereby the lead grasping or clamping device is actuated to take hold of and release the lead. lt is characterized by the combination, with the leadtube or other instrumentality which carries the jaws or lead-grasping device, ofwhat may be termed a pressure-tube,7 and an intermediate stationary tube fast to the case or sheath,

the three being connected by pin-and-slot connections, substantially in the manner hereinafter described, so that the pressuretube, when moved longitudinally, shall also have a movement of partial rotation, with the effect ot' imparting to the lead-tube or other jaw-carto the accompanying drawings, in which- Figure lis a longitudinal central section, partly in elevation, of my improved holder, the parts being represented in the position which they assume when the lead projects from the sheath and is grasped by the jaws. Fig. 2 is a similar section, partlyin elevation, ofthe holder, with the parts in position which they assume when thejaws are moved to a position in which the lead is released from their grasp. Fig. 3 is a section on line .t m, Fig. l. Fig. 4 is a sectional view ot' the tip ofthe holder, with the jaws in the position which they occupy when the lead is wholly within the sheath.

The sheath A and tip a are of any suitable construction. Y

lB is the lead-tube, terminating at its front end in clamping-jaws I), which normally stand apart, and are closed on the lead by being forced forward against the contracted end of the tip a.

Surrounding tube B for a portion of its length is a tube, C, (the intermediate tube hereinbefore referred to,) which is fast to the sheath A, as indicated at c; and surrounding the upper portion of the tube G is what I have hereinbefore termed the pressure-tube, D, to Vwhich is fastened a cap, D, similar tO the pressure-cap7 of the ordinary automatic pencil.

The tube G is stationary. The tubes B D are movable, and they are all three connected in the following manner: The inner tube, B, is provided with a stud, d, which projects l'through a spirally-curved4 slot, c, in the intermediate tube, C, and into a straight longitudinal slot,f, in the pressure-tube l). The'intermediate tube, C, (which, it will be reinembered,is stationary,) has a stud, y, which projects into aspirally-curved slot, 1,in the pt essure-tube D. The slot IL is curved in a reverse direction to the slot e. The result of this arrangement is as followsamWhen the pressuretube D is pushed forward it will,by reason of the engagement ot' its curved sloth with the stationary pin g, have imparted to it a movement ot' partialrota-tion in the direction of the arrow l in Fig. 1. The effect of this latter movementwill be to cause it to bear laterally on the pin d, which engages its straight slot f, and this will result iu forcing the pin to travel up through the curved slot e in the intermediate stationary'tube in the direction indicated by arrow 2, Fig. 1. The tube B necessarily partakes ofthe movement of pin d, and consequently-is, while partly rotated, also drawn' back away from the contracted end of the tip a, as indicated in Fig. 2, thus permitting thejaws b to expand and release the lead A reverse movement of the pressure-tube causes a corresponding reverse movement ot' thejaws. Thus the two tubes, while rotating in the same direction, move lengthwise in Opposite directions.

Between the front end ofthe pressure-tube and the fixed point c is interposed a spiral spring, E, (answering to the retracting-spring of the ordinary automatic pencih) which is compressed, as indicated in Fig. 2, when the pressure-tube is pushed forward, and act-s by its recoil, when released from pressure, to return the parts to their normal position, as indicated in Fig. l.

Having described the best way known to me of carrying` my improvement into effect, what I claim as new and of myinvention is- 1. The combination, yin a lead, or crayon holder, of the sheath or case, the lead-tube or jaw-carrier, the pressure-tube, and the intermediate stationary tube, said tubes being,` connected together by pinandslot connection, substantially in the manner hereinbefore described, so that the lengthwise movement of the pressure-tube shall cause corresponding QWLISE lengthwise movement in the opposite direction of the lead-tube orjaw-earrier.

2. rlhe combination, with the sheath or case, and with the lead-tube or jawca1rier, the intermediate stationary tube and the pressuretube, connected together by pin-and-slot connection, snbstantialiyin the manner hcreinbefore described, of the pressure-cap and the rctractingspring, substantially as hereinbefore set forth.

In testimony whereof I have. hereunto set my hand this 31st day of May, 1882.

CLAES NVM. ROMAN.

Witnesses:

LEOPOLD AUsBAoHER, J 0E W. SWAINE. 

